hardware/link-mso19/api.c

   1 /*
   2  * This file is part of the libsigrok project.
   3  *
   4  * Copyright (C) 2011 Daniel Ribeiro <drwyrm@gmail.com>
   5  * Copyright (C) 2012 Renato Caldas <rmsc@fe.up.pt>
   6  * Copyright (C) 2013 Lior Elazary <lelazary@yahoo.com>
   7  *
   8  * This program is free software: you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation, either version 3 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20  */
  21
  22 #include "protocol.h"
  23
  24 static const int32_t hwcaps[] = {
  25         SR_CONF_OSCILLOSCOPE,
  26         SR_CONF_LOGIC_ANALYZER,
  27         SR_CONF_SAMPLERATE,
  28         SR_CONF_TRIGGER_TYPE,
  29         SR_CONF_TRIGGER_SLOPE,
  30         SR_CONF_HORIZ_TRIGGERPOS,
  31 //      SR_CONF_CAPTURE_RATIO,
  32         SR_CONF_LIMIT_SAMPLES,
  33 //      SR_CONF_RLE,
  34 };
  35
  36 /*
  37  * Channels are numbered 0 to 7.
  38  *
  39  * See also: http://www.linkinstruments.com/images/mso19_1113.gif
  40  */
  41 SR_PRIV const char *mso19_channel_names[NUM_CHANNELS + 1] = {
  42         /* Note: DSO needs to be first. */
  43         "DSO", "0", "1", "2", "3", "4", "5", "6", "7", NULL,
  44 };
  45
  46 static const uint64_t samplerates[] = {
  47         SR_HZ(100),
  48         SR_MHZ(200),
  49         SR_HZ(100),
  50 };
  51
  52 SR_PRIV struct sr_dev_driver link_mso19_driver_info;
  53 static struct sr_dev_driver *di = &link_mso19_driver_info;
  54
  55 /* TODO: Use sr_dev_inst to store connection handle & use std_dev_clear(). */
  56 static int dev_clear(void)
  57 {
  58         GSList *l;
  59         struct sr_dev_inst *sdi;
  60         struct drv_context *drvc;
  61         struct dev_context *devc;
  62         int ret = SR_OK;
  63
  64         if (!(drvc = di->priv))
  65                 return SR_OK;
  66
  67         /* Properly close and free all devices. */
  68         for (l = drvc->instances; l; l = l->next) {
  69                 if (!(sdi = l->data)) {
  70                         /* Log error, but continue cleaning up the rest. */
  71                         sr_err("%s: sdi was NULL, continuing", __func__);
  72                         ret = SR_ERR_BUG;
  73                         continue;
  74                 }
  75                 if (!(devc = sdi->priv)) {
  76                         /* Log error, but continue cleaning up the rest. */
  77                         sr_err("%s: sdi->priv was NULL, continuing", __func__);
  78                         ret = SR_ERR_BUG;
  79                         continue;
  80                 }
  81                 std_serial_dev_close(sdi);
  82                 sr_serial_dev_inst_free(devc->serial);
  83                 sr_dev_inst_free(sdi);
  84         }
  85         g_slist_free(drvc->instances);
  86         drvc->instances = NULL;
  87
  88         return ret;
  89 }
  90
  91 static int init(struct sr_context *sr_ctx)
  92 {
  93         return std_init(sr_ctx, di, LOG_PREFIX);
  94 }
  95
  96 static GSList *scan(GSList *options)
  97 {
  98         int i;
  99         GSList *devices = NULL;
 100         const char *conn = NULL;
 101         const char *serialcomm = NULL;
 102         GSList *l;
 103         struct sr_config *src;
 104         struct udev *udev;
 105         int chtype;
 106
 107         for (l = options; l; l = l->next) {
 108                 src = l->data;
 109                 switch (src->key) {
 110                 case SR_CONF_CONN:
 111                         conn = g_variant_get_string(src->data, NULL);
 112                         break;
 113                 case SR_CONF_SERIALCOMM:
 114                         serialcomm = g_variant_get_string(src->data, NULL);
 115                         break;
 116                 }
 117         }
 118         if (!conn)
 119                 conn = SERIALCONN;
 120         if (serialcomm == NULL)
 121                 serialcomm = SERIALCOMM;
 122
 123         udev = udev_new();
 124         if (!udev) {
 125                 sr_err("Failed to initialize udev.");
 126         }
 127
 128         struct udev_enumerate *enumerate = udev_enumerate_new(udev);
 129         udev_enumerate_add_match_subsystem(enumerate, "usb-serial");
 130         udev_enumerate_scan_devices(enumerate);
 131         struct udev_list_entry *devs = udev_enumerate_get_list_entry(enumerate);
 132         struct udev_list_entry *dev_list_entry;
 133         for (dev_list_entry = devs;
 134              dev_list_entry != NULL;
 135              dev_list_entry = udev_list_entry_get_next(dev_list_entry)) {
 136                 const char *syspath = udev_list_entry_get_name(dev_list_entry);
 137                 struct udev_device *dev =
 138                     udev_device_new_from_syspath(udev, syspath);
 139                 const char *sysname = udev_device_get_sysname(dev);
 140                 struct udev_device *parent =
 141                     udev_device_get_parent_with_subsystem_devtype(dev, "usb",
 142                                                                   "usb_device");
 143
 144                 if (!parent) {
 145                         sr_err("Unable to find parent usb device for %s",
 146                                sysname);
 147                         continue;
 148                 }
 149
 150                 const char *idVendor =
 151                     udev_device_get_sysattr_value(parent, "idVendor");
 152                 const char *idProduct =
 153                     udev_device_get_sysattr_value(parent, "idProduct");
 154                 if (strcmp(USB_VENDOR, idVendor)
 155                     || strcmp(USB_PRODUCT, idProduct))
 156                         continue;
 157
 158                 const char *iSerial =
 159                     udev_device_get_sysattr_value(parent, "serial");
 160                 const char *iProduct =
 161                     udev_device_get_sysattr_value(parent, "product");
 162
 163                 char path[32];
 164                 snprintf(path, sizeof(path), "/dev/%s", sysname);
 165                 conn = path;
 166
 167                 size_t s = strcspn(iProduct, " ");
 168                 char product[32];
 169                 char manufacturer[32];
 170                 if (s > sizeof(product) ||
 171                     strlen(iProduct) - s > sizeof(manufacturer)) {
 172                         sr_err("Could not parse iProduct: %s.", iProduct);
 173                         continue;
 174                 }
 175                 strncpy(product, iProduct, s);
 176                 product[s] = 0;
 177                 strcpy(manufacturer, iProduct + s + 1);
 178
 179                 //Create the device context and set its params
 180                 struct dev_context *devc;
 181                 if (!(devc = g_try_malloc0(sizeof(struct dev_context)))) {
 182                         sr_err("Device context malloc failed.");
 183                         return devices;
 184                 }
 185
 186                 if (mso_parse_serial(iSerial, iProduct, devc) != SR_OK) {
 187                         sr_err("Invalid iSerial: %s.", iSerial);
 188                         g_free(devc);
 189                         return devices;
 190                 }
 191
 192                 char hwrev[32];
 193                 sprintf(hwrev, "r%d", devc->hwrev);
 194                 devc->ctlbase1 = 0;
 195                 devc->protocol_trigger.spimode = 0;
 196                 for (i = 0; i < 4; i++) {
 197                         devc->protocol_trigger.word[i] = 0;
 198                         devc->protocol_trigger.mask[i] = 0xff;
 199                 }
 200
 201                 if (!(devc->serial = sr_serial_dev_inst_new(conn, serialcomm))) {
 202                         g_free(devc);
 203                         return devices;
 204                 }
 205
 206                 struct sr_dev_inst *sdi = sr_dev_inst_new(0, SR_ST_INACTIVE,
 207                                                 manufacturer, product, hwrev);
 208
 209                 if (!sdi) {
 210                         sr_err("Unable to create device instance for %s",
 211                                sysname);
 212                         sr_dev_inst_free(sdi);
 213                         g_free(devc);
 214                         return devices;
 215                 }
 216
 217                 sdi->driver = di;
 218                 sdi->priv = devc;
 219
 220                 for (i = 0; i < NUM_CHANNELS; i++) {
 221                         struct sr_channel *ch;
 222                         chtype = (i == 0) ? SR_CHANNEL_ANALOG : SR_CHANNEL_LOGIC;
 223                         if (!(ch = sr_channel_new(i, chtype, TRUE,
 224                                                    mso19_channel_names[i])))
 225                                 return 0;
 226                         sdi->channels = g_slist_append(sdi->channels, ch);
 227                 }
 228
 229                 //Add the driver
 230                 struct drv_context *drvc = di->priv;
 231                 drvc->instances = g_slist_append(drvc->instances, sdi);
 232                 devices = g_slist_append(devices, sdi);
 233         }
 234
 235         return devices;
 236 }
 237
 238 static GSList *dev_list(void)
 239 {
 240         return ((struct drv_context *)(di->priv))->instances;
 241 }
 242
 243 static int dev_open(struct sr_dev_inst *sdi)
 244 {
 245         int ret;
 246         struct dev_context *devc;
 247
 248         devc = sdi->priv;
 249
 250         if (serial_open(devc->serial, SERIAL_RDWR) != SR_OK)
 251                 return SR_ERR;
 252
 253         sdi->status = SR_ST_ACTIVE;
 254
 255         /* FIXME: discard serial buffer */
 256         mso_check_trigger(devc->serial, &devc->trigger_state);
 257         sr_dbg("Trigger state: 0x%x.", devc->trigger_state);
 258
 259         ret = mso_reset_adc(sdi);
 260         if (ret != SR_OK)
 261                 return ret;
 262
 263         mso_check_trigger(devc->serial, &devc->trigger_state);
 264         sr_dbg("Trigger state: 0x%x.", devc->trigger_state);
 265
 266         //    ret = mso_reset_fsm(sdi);
 267         //    if (ret != SR_OK)
 268         //            return ret;
 269         //    return SR_ERR;
 270
 271         return SR_OK;
 272 }
 273
 274 static int cleanup(void)
 275 {
 276         return dev_clear();
 277 }
 278
 279 static int config_get(int id, GVariant **data, const struct sr_dev_inst *sdi,
 280                 const struct sr_channel_group *cg)
 281 {
 282         struct dev_context *devc;
 283
 284         (void)cg;
 285
 286         switch (id) {
 287         case SR_CONF_SAMPLERATE:
 288                 if (sdi) {
 289                         devc = sdi->priv;
 290                         *data = g_variant_new_uint64(devc->cur_rate);
 291                 } else
 292                         return SR_ERR;
 293                 break;
 294         default:
 295                 return SR_ERR_NA;
 296         }
 297
 298         return SR_OK;
 299 }
 300
 301 static int config_set(int id, GVariant *data, const struct sr_dev_inst *sdi,
 302                 const struct sr_channel_group *cg)
 303 {
 304         int ret;
 305         struct dev_context *devc;
 306         uint64_t num_samples;
 307         const char *slope;
 308         int trigger_pos;
 309         double pos;
 310
 311         (void)cg;
 312         devc = sdi->priv;
 313
 314         if (sdi->status != SR_ST_ACTIVE)
 315                 return SR_ERR_DEV_CLOSED;
 316
 317         switch (id) {
 318         case SR_CONF_SAMPLERATE:
 319                 // FIXME
 320                 return mso_configure_rate(sdi, g_variant_get_uint64(data));
 321                 ret = SR_OK;
 322                 break;
 323         case SR_CONF_LIMIT_SAMPLES:
 324                 num_samples = g_variant_get_uint64(data);
 325                 if (num_samples != 1024) {
 326                         sr_err("Only 1024 samples are supported.");
 327                         ret = SR_ERR_ARG;
 328                 } else {
 329                         devc->limit_samples = num_samples;
 330                         sr_dbg("setting limit_samples to %i\n",
 331                                num_samples);
 332                         ret = SR_OK;
 333                 }
 334                 break;
 335         case SR_CONF_CAPTURE_RATIO:
 336                 ret = SR_OK;
 337                 break;
 338         case SR_CONF_TRIGGER_SLOPE:
 339                 slope = g_variant_get_string(data, NULL);
 340
 341                 if (!slope || !(slope[0] == 'f' || slope[0] == 'r'))
 342                         sr_err("Invalid trigger slope");
 343                         ret = SR_ERR_ARG;
 344                 } else {
 345                         devc->trigger_slope = (slope[0] == 'r')
 346                                 ? SLOPE_POSITIVE : SLOPE_NEGATIVE;
 347                         ret = SR_OK;
 348                 }
 349                 break;
 350         case SR_CONF_HORIZ_TRIGGERPOS:
 351                 pos = g_variant_get_double(data);
 352                 if (pos < 0 || pos > 255) {
 353                         sr_err("Trigger position (%f) should be between 0 and 255.", pos);
 354                         ret = SR_ERR_ARG;
 355                 } else {
 356                         trigger_pos = (int)pos;
 357                         devc->trigger_holdoff[0] = trigger_pos & 0xff;
 358                         ret = SR_OK;
 359                 }
 360                 break;
 361         case SR_CONF_RLE:
 362                 ret = SR_OK;
 363                 break;
 364         default:
 365                 ret = SR_ERR_NA;
 366                 break;
 367         }
 368
 369         return ret;
 370 }
 371
 372 static int config_list(int key, GVariant **data, const struct sr_dev_inst *sdi,
 373                 const struct sr_channel_group *cg)
 374 {
 375         GVariant *gvar;
 376         GVariantBuilder gvb;
 377
 378         (void)cg;
 379         (void)sdi;
 380
 381         switch (key) {
 382         case SR_CONF_DEVICE_OPTIONS:
 383                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
 384                                 hwcaps, ARRAY_SIZE(hwcaps), sizeof(int32_t));
 385                 break;
 386         case SR_CONF_SAMPLERATE:
 387                 g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}"));
 388                 gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"), samplerates,
 389                                 ARRAY_SIZE(samplerates), sizeof(uint64_t));
 390                 g_variant_builder_add(&gvb, "{sv}", "samplerate-steps", gvar);
 391                 *data = g_variant_builder_end(&gvb);
 392                 break;
 393         case SR_CONF_TRIGGER_TYPE:
 394                 *data = g_variant_new_string(TRIGGER_TYPE);
 395                 break;
 396         default:
 397                 return SR_ERR_NA;
 398         }
 399
 400         return SR_OK;
 401 }
 402
 403 static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data)
 404 {
 405         struct dev_context *devc;
 406         int ret = SR_ERR;
 407
 408         if (sdi->status != SR_ST_ACTIVE)
 409                 return SR_ERR_DEV_CLOSED;
 410
 411         devc = sdi->priv;
 412
 413         if (mso_configure_channels(sdi) != SR_OK) {
 414                 sr_err("Failed to configure channels.");
 415                 return SR_ERR;
 416         }
 417
 418         /* FIXME: No need to do full reconfigure every time */
 419 //      ret = mso_reset_fsm(sdi);
 420 //      if (ret != SR_OK)
 421 //              return ret;
 422
 423         /* FIXME: ACDC Mode */
 424         devc->ctlbase1 &= 0x7f;
 425 //      devc->ctlbase1 |= devc->acdcmode;
 426
 427         ret = mso_configure_rate(sdi, devc->cur_rate);
 428         if (ret != SR_OK)
 429                 return ret;
 430
 431         /* set dac offset */
 432         ret = mso_dac_out(sdi, devc->dac_offset);
 433         if (ret != SR_OK)
 434                 return ret;
 435
 436         ret = mso_configure_threshold_level(sdi);
 437         if (ret != SR_OK)
 438                 return ret;
 439
 440         ret = mso_configure_trigger(sdi);
 441         if (ret != SR_OK)
 442                 return ret;
 443
 444         /* END of config hardware part */
 445         ret = mso_arm(sdi);
 446         if (ret != SR_OK)
 447                 return ret;
 448
 449         /* Start acquisition on the device. */
 450         mso_check_trigger(devc->serial, &devc->trigger_state);
 451         ret = mso_check_trigger(devc->serial, NULL);
 452         if (ret != SR_OK)
 453                 return ret;
 454
 455         /* Reset trigger state. */
 456         devc->trigger_state = 0x00;
 457
 458         /* Send header packet to the session bus. */
 459         std_session_send_df_header(cb_data, LOG_PREFIX);
 460
 461         /* Our first channel is analog, the other 8 are of type 'logic'. */
 462         /* TODO. */
 463
 464         serial_source_add(sdi->session, devc->serial, G_IO_IN, -1,
 465                         mso_receive_data, cb_data);
 466
 467         return SR_OK;
 468 }
 469
 470 /* This stops acquisition on ALL devices, ignoring dev_index. */
 471 static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
 472 {
 473         (void)cb_data;
 474
 475         stop_acquisition(sdi);
 476
 477         return SR_OK;
 478 }
 479
 480 SR_PRIV struct sr_dev_driver link_mso19_driver_info = {
 481         .name = "link-mso19",
 482         .longname = "Link Instruments MSO-19",
 483         .api_version = 1,
 484         .init = init,
 485         .cleanup = cleanup,
 486         .scan = scan,
 487         .dev_list = dev_list,
 488         .dev_clear = dev_clear,
 489         .config_get = config_get,
 490         .config_set = config_set,
 491         .config_list = config_list,
 492         .dev_open = dev_open,
 493         .dev_close = std_serial_dev_close,
 494         .dev_acquisition_start = dev_acquisition_start,
 495         .dev_acquisition_stop = dev_acquisition_stop,
 496         .priv = NULL,
 497 };